| Problem | Likely Cause | Fix | |---------|--------------|-----| | | Wrong or corrupted key fragment | Double‑check the key you received; copy‑paste it again. | | Download stalls at 0 % | Browser extensions (e.g., ad blockers) interfering | Disable the extension temporarily or use a private/incognito window. | | File appears corrupted after download | Incomplete download or network interruption | Use the “Resume” button or re‑download the file. | | “Quota exceeded” error | Free account hitting daily bandwidth limit | Wait 24 hours, or upgrade to a paid plan for higher limits. | | Cannot open a preview | File type not supported for preview | Download the file and open it with a local application. |